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Dongguan JUYE Plastic Technology Co., Ltd. is a TPE thermoplastic elastomer company integrating research and development, production, and sales.

Publication: 2019-08-31Reading time: 4759
HOME > MEDIA > Industrial News > Discussion on Three Major Problems of Self-Adhesive Properties of TPE and TPR Materials

Discussion on Three Major Problems of Self-Adhesive Properties of TPE and TPR Materials

Conventional TPE and TPR do not have functional viscosity, but need to be adjusted through the compounding system to obtain the required adhesion. With the continuous deepening and expansion of the application of thermoplastic elastomers TPE and TPR, the adhesive properties of TPE and TPR (including self-adhesion and co-adhesion) can be gradually applied to different industries.

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Conventional TPE and TPR do not have functional viscosity, but need to be adjusted through the compounding system to obtain the required adhesion. With the continuous deepening and expansion of the application of thermoplastic elastomers TPE and TPR, the adhesive properties of TPE and TPR (including self-adhesion and co-adhesion) can be gradually applied to different industries.

1. Self-adhesion of TPE material: refers to the strong adhesion on the surface of TPE material, similar to a surface coated with glue. This strongly self-adhesive TPE material can be used to stick daily items and prevent them from falling or tipping over. Similar TPE materials have been developed and patented by a foreign TPE manufacturer. In fact, in traditional TPE compounding systems, the surface viscosity of TPE materials can be improved by adding tackifiers compatible with the main compounding system. This stickiness is positive and is required and desired by users.


2. Surface viscosity of soft TPE materials. Some low-hardness TPE materials have a sticky feel on the surface of soft TPE materials because of the high oil content in the compound. This sticky feeling is caused by the oil in the formulation. Usually SBS-based TPE (TPR) is more prone to surface adhesion problems, which are negative and what users want to eliminate.
 
3. Viscosity during overmolding. The viscosity mentioned here refers to the melt bonding between TPE and the coated substrate (plastic), which is due to the close solubility or good compatibility of the two materials on the bonding surface during injection molding at high temperatures. The quality of bonding mainly depends on the surface affinity of TPE to the coated plastic (similar melting points, close polarity and surface tension, etc.)


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